I bought a custom-made yellow-cedar wood pinhole camera that takes regular 4x5 sheet film holders, several years ago from a young photog in Vancouver, BC.
It's called the Binary Box camera - try Googling it, I may have his contact info somewhere in a mountain of paper at home! It works wonderfully well.
I googled it, but nothing comes up resembling what you describe. I'd love to find out more if you have any info about them